A 1929 Bentley single-seat race car known as the Birkin Bentley fetched just over £5 million, or about$7.9 million, at the Bonhams sale held during the Goodwood Festival of Speed in England. The auction house said the price is a record for a British car sold at auction.

The car, a 4.5-liter supercharged model, was designed for high-speed circuits like England’s old high-banked Brooklands track. It belonged to Tim Birkin, who was a member of a famous group of racers known as the Bentley Boys, who competed in Bentleys and helped develop them during the brand’s golden age.

Auction house Bonhams said it will offer a 1929 Bentley that it calls “the most valuable Bentley in the world.” The car, a 1929 4.5-liter supercharged single-seat racer, is said to represent the genesis of a famous line of supercharged or “Blower” Bentleys that included cars that set speed records and competed at Le Mans in the late 1920s and very early 1930s.

The car to be auctioned is expected to fetch more than $6 million, according to auction house estimates. Bonhams said it is a well-known car with documented history since new.